1998676663 has 2 divisors, whose sum is σ = 1998676664. Its totient is φ = 1998676662.

The previous prime is 1998676657. The next prime is 1998676727. The reversal of 1998676663 is 3666768991.

It is a weak prime.

It is an emirp because it is prime and its reverse (3666768991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1998676663 - 2¹³ = 1998668471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1998676763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 999338331 + 999338332.

It is an arithmetic number, because the mean of its divisors is an integer number (999338332).

Almost surely, 2^1998676663 is an apocalyptic number.

1998676663 is a deficient number, since it is larger than the sum of its proper divisors (1).

1998676663 is an equidigital number, since it uses as much as digits as its factorization.

1998676663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17635968, while the sum is 61.

The square root of 1998676663 is about 44706.5617443346. The cubic root of 1998676663 is about 1259.6431052264.

The spelling of 1998676663 in words is "one billion, nine hundred ninety-eight million, six hundred seventy-six thousand, six hundred sixty-three".